#ifndef _COM_H
#define _COM_H
extern void itoa(unsigned long da,unsigned char xdata *ptr,unsigned char lenth);
extern void SendString(unsigned char const *ptr);
extern void SendDigital(signed long da,signed char);
extern void SendCmd(unsigned char const *ptr);
extern void InitBaud(unsigned char);
extern unsigned char inbuff[];
extern bit erev;
#endif 
